The New York State Board of Elections had canceled the June 23 primary over concerns about the coronavirus pandemic.
2020 democratic presidential primary
Biden was already the presumptive presidential nominee, after Bernie Sanders suspended his campaign. Wisconsin controversially held in-person voting despite the pandemic.
Now that Bernie Sanders is out of the presidential race and Joe Biden is the presumptive nominee, his campaign is reaching out to progressive groups.
Though the Vermont senator did not emerge as the Democratic nominee in either of his two bids, his campaigns have reshaped the party's politics and policy in significant ways.
One of the hardest decisions for any candidate is whether to drop out of a race. It's even harder for the Vermont senator, who, at 78, likely wouldn't run for president again.
After an 11th-hour scramble, Wisconsin forged ahead with its election despite fears about the coronavirus outbreak and an ongoing stay-at-home order.
Gov. Tony Evers tried to postpone voting and extend the absentee deadline, but he was blocked by courts. Results for Tuesday's contests are not expected for days.
The party's nominating convention had already been delayed a month, with a possible format change.
Originally set for July, the convention has been rescheduled for mid-August in Milwaukee because of the coronavirus.